sgilmore10 opened a new pull request, #36210:
URL: https://github.com/apache/arrow/pull/36210
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### Rationale for this change
As we continue to build up the MATLAB Interface, we need to add the `Type`
class hierarchy to the interface to support objects with schemas.
### What changes are included in this PR?
1. Added an enum class called `arrow.type.ID` with the following values:
```matlab
>> enumeration(arrow.type.ID.Boolean)
Enumeration members for class 'arrow.type.ID':
Boolean
UInt8
Int8
UInt16
Int16
UInt32
Int32
UInt64
Int64
Float32
Float64
```
2. Added an abstract class representing a type called `arrow.type.Type`. It
defines one property named `ID` that all concrete subclasses must define. `ID`
must be an `arrow.type.ID`.
3. Defined an abstract class called `arrow.type.PrimitiveType` that inherits
from `arrow.type.Type`. All primitive type classes inherit from this class.
4. Defined the following concrete type classes:
- `arrow.type.BooleanType`
- `arrow.type.Float32Type`
- `arrow.type.Float64Type`
- `arrow.type.Int8Type`
- `arrow.type.UInt8Type`
- `arrow.type.Int16Type`
- `arrow.type.UInt16Type`
- `arrow.type.Int32Type`
- `arrow.type.UInt32Type`
- `arrow.type.Int64Type`
- `arrow.type.UInt64Type`
### Are these changes tested?
Yes, added the following test classes:
- `tID.m`
- `tBooleanType.m`
- `tFloat32Type.m`
- `tFloat64Type.m`
- `tInt8Type.m`
- `tUInt8Type.m`
- `tInt16Type.m`
- `tUInt16Type.m`
- `tInt32Type.m`
- `tUInt32Type.m`
- `tInt64Type.m`
- `tUInt64Type.m`
### Future Directions
1. Add a new property to `arrow.array.Array` called `Type`.
2. Add a `arrow.type.Field` class.
3. Add a `arrow.tabular.Schema` class.
4. As we add more array types, we will extend `arrow.type.ID` and add the
appropriate type class.
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